Electric time relay



April 1931- J. STIOECKLIN 1,802,039

ELECTRI C TIME RELAY Filed Dec. 27. 1927 e o l p f l i a t n t r h d k 9Fig.2

d ffoec 16/ Patented Apr. 21, 1931 JOSEF STOECKLIN, OF ZURICH,SHETZll-B-LAND. ASSTGIPJIUB, 1-:KTIIlNG-ESELLSCHAFT BROWN, BOVERI ANDCIFL,

OF BADEN, SVI'ITZERLAND ELECTRIC TIME RELAY Application filed December27, 1927, Serial No. 242,882, and in Germany December 30, 1926.

Electric relays are frequently equipped wlth retarding devices whichdelay the time of closure and such retarding mechanism is usuallyinterposed between the driving and.

driving and the driven system of the relay.

is effected in such a manner that the work re quired for connecting anddisconnecting the coupling is provided exclusively by the drivingsystem, while the electric means feedingthe relay has only to performthe tripping work.

The coupling may consist for instance of a motor driven wheel whichdrives at least one other wheel iournalled in a rocking member coaxialwith the said Wheel, so that through the driving torque the rockingmember is swung round and the wheel journalled in it is thereby causedto engage with or be disengaged from the other wheel. belonging to thedriven system.

In the accompanying drawing a time relay mechanism of this kind is shownin elevation Fig. 1, and plan view Fig. 2.

The motor or driving force for the time mechanism is the spring a. onthe shaft 1) on which is mounted the toothed wheel 0 and which is woundup in the direction indicated by the arrow. The shaft d of the secondset of wheels 6. f is also journalled in the fixed frame 7 of the relayand supports the ratchet wheel h with which the detent 70, which ispressed against it by the spring a. engages, when the relay magnet i isnot energized or not sufliciently energized. Between the two stops m andn the frame 0 rocks about the shaft d, in which frame two furthershafts,

Above the wheel 9' is iour- The relav acts. when through theelectromagnet i being suitably energ zed. the (letcnt 7c is disengzagedfrom the ratchet wheel It. The spring a will. then drive the train ofwheels 0, e. f. 79. (7. 7" which is damped bv the air resistance of thevane wheel 1/. the lirec- .tion of rotation of the various shafts beingindicated by arrows. On the lockina' means 70. 71 being released. thewhole of the torque of the relay 1'' will in the first moment he usedfor accelerating the following wheels 70. (I. r, and the damping vanewheel it. thus acting at the same time on the rocking frame 0, causingthe latter to lift from the top on and to brine: the wheel/ intoengagement with the wheel w. These wheels remain in engagement until.through the magnetic circuit i being broken owing to contact being madeat 1 or for some other reason. the detent 7c is again brought into ensracement with the wheel h bringing the toothed wheel 7 to rest. Owing toits kinet c enersrv the wheel will continue to rotate and through thecounter balance moment thus created moves the rocking member 0 out ofengagement. so that the weight is free to descend and the relay is againready for operation.

When the (lrimng mechanism is so constructed to be capable of beingdriven in both directions of rotation. it is possible to couple for eachdirection of rotation a sepa-= driven system instead of to theintermediate What I claim is:

1. A time relay mechanism comprising a motor disposed in a fixed frame,a plurality of gears in said frame driven by said motor, releasing andlocking means for controlling the operation of said gears, a secondframe oscillatable about said fixed frame, a plurality of gears disposedin said frame and adapted to be driven by the movement of the gears inthe fixed frame, a gear wheel mounted in said fixed frame and adapted tobe driven by one of the gear wheels of the oscillatable frame when theframe is moved from its normal position, upon the releasing of thedriving motor, and means actuated by said gear for operating anelectrical contact.

2. A time relay mechanism comprising a motor disposed in a fixed frame,a plurality of gears in said frame driven by said motor, releasing andlocking means for controlling the operation of said gears, a secondframe oscillatable about said fixed frame, a plurality of gears disposedin said frame and adapted to be driven by the movement of the gears inthe fixed frame, a governor for controlling said gears, a gear wheelmounted in said fixed frame and adapted to be driven by one of the gearwheels of the oscillatable frame when the frame is moved from its normalposition, upon the releasing of the driving motor, and means actuated bysaid gear for operating an electrical contact.

3. An electric time relay comprising a pair of contacts, a driving trainof wheels actuated by an independent source of power, a trippingelectromagnet controlling a detent for said driving train, a drivensystem of wheels which operates the said contacts after a predeterminedtime interval from the start of said driven system and an automaticcoupling, energized by said source of power for connecting said drivingand driven systems upon release of said detent, said coupling includinga planet wheel mounted in a pivoted frame.

In testimony whereof I have signed my name to this specification.

J OSEF STOEGKLIN.

